Interviewed by Rufus B. Spain on June 25, 1975; W. L. and C. T. Cooper were interviewed together by David Stricklin on 30 May and 3 June 1985; C. T. Cooper was interviewed by Anne Radford Phillips on 1 November 1991, in Waco, Texas

Interviewed by Rebecca Sharpless seven times from June 25, 2003 to June 2, 2005, Rebecca Sharpless and Lois Myers three times from March 8, 2006 to July 6, 2006, and Lois Myers twenty-two times from August 10, 2006 to July 23, 2013. All interviews...